Larsen & Toubro Limited Mechanical Supervisor Interview Questions and Answers for Experienced

Q1. Introduction about yourself
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Q2. About types of transformer, motors, working principle
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Q3. Power system related questions
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Q1. Technical questions about basic electrical
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Q2. Basic electrical regarding questions
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Q1. Harness routing considerations.
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Harness routing involves planning the layout of electrical cables for optimal performance and safety in devices.
• Minimize bends and twists to reduce signal loss and wear on cables.

• Maintain separation between power and signal wires to prevent interference.

• Use protective conduits in high-stress areas to enhance durability.

• Consider thermal management by routing away from heat sources.

• Plan for accessibility to facilitate ma
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Q2. Harness conduit selection.
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Q1. As per company policy requirement condition
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Q1. As per company policy requirement
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Q1. How many year you have experience
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Q1. 1) tell me about your self?
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Q2. 2) what is the SAP prodecudre of called UPS vendor.
Ans. 
SAP procedure for UPS vendor is a process for managing vendor data in the SAP system.
• The SAP procedure for UPS vendor involves creating and maintaining vendor master data in the system.

• It includes defining vendor attributes such as payment terms, delivery schedules, and contact information.

• The procedure also involves creating purchase orders and managing invoices from the vendor.

• Examples of UPS vendors include APC, Eat
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Q3. 3) what is the mainten procedure of DG.
Ans. 
The maintenance procedure of DG involves regular checks and servicing to ensure optimal performance.
• Regularly check oil and coolant levels

• Inspect air filters and replace if necessary

• Clean and inspect spark plugs

• Check battery and charging system

• Perform load bank testing

• Schedule routine maintenance with a qualified technician

• Keep a maintenance log for record keeping
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Q4. 4) whatbis the ATS scheme.
Ans. 
ATS scheme stands for Automatic Transfer Switch scheme used in power systems.
• ATS scheme is used to transfer power supply from one source to another in case of power failure.

• It is commonly used in backup power systems to ensure uninterrupted power supply.

• ATS scheme can be implemented using mechanical or electronic switches.

• It is important to ensure proper coordination between the ATS and protective devices to avoid any ...read more
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Q5. 5) what you do if your technician is argument with you?
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Address the issue calmly and professionally, listen to their perspective and try to find a solution together.
• Remain calm and avoid getting defensive

• Listen to their perspective and try to understand their point of view

• Communicate clearly and respectfully

• Try to find a solution together

• If necessary, involve a mediator or supervisor
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Q6. 6) what is the prodecudre of transformer pm?
Ans. 
Transformer PM involves regular maintenance and inspection to ensure optimal performance.
• Perform regular visual inspections to check for signs of wear and tear

• Test insulation resistance to ensure it meets standards

• Check oil levels and perform oil analysis to detect any contaminants

• Inspect and tighten connections

• Perform load and temperature tests

• Schedule maintenance based on manufacturer recommendations

• Examples of maint...read more
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Q7. 7) what type.of protection provided in transformer.
Ans. 
Transformers are protected by various methods to prevent damage from faults and overloads.
• Overcurrent protection using fuses or circuit breakers

• Thermal protection using temperature sensors and alarms

• Buchholz relay protection for detecting internal faults

• Differential protection for detecting external faults

• Ground fault protection using ground fault relays

• Lightning arrestors for protection against lightning strikes

• Oil le...read more
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